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公然要测试数据影响不太好吧...

Posted by wywcgs at 2006-08-19 17:05:53 on Problem 2942
In Reply To:WA的郁闷了!!! Posted by:chhot at 2006-08-19 16:57:59 
求双连通分量然后判断每个连通分量是否存在奇圈，是则可证明该双连通分量每点必在奇圈上
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